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Runs in your browserChange a CSV delimiter
If a CSV opens in Excel with everything crammed into column A, the delimiter is usually the reason — much of Europe uses semicolons because the comma is the decimal separator. This detects what your file actually uses and rewrites it with the delimiter you need.
How to use it
- Choose your file. The current delimiter is detected automatically.
- Pick the delimiter you want in the output.
- Click Convert and download the corrected file.
Questions
Is my file uploaded anywhere?
No. This page contains the whole tool — the JavaScript that does the work runs inside your browser tab, on your own machine. There is no server to upload to. You can confirm it yourself: open your browser's developer tools, switch to the Network tab, and run the tool. You will not see your file go anywhere. You can also disconnect from the internet after the page loads and it will still work.
Why does my CSV open as one column in Excel?
Excel uses your system's list separator, which follows your regional settings. On many European systems that's a semicolon, so a comma-separated file isn't recognised as delimited at all and lands in a single column. Converting to semicolons fixes it without changing your Excel settings.
What happens to values that contain the new delimiter?
They're quoted automatically, following the standard CSV escaping rules, so the output stays valid no matter which delimiter you pick.